We use the very deep XMM-Newton observations in the CDF-S to measure the distribution of absorption in the AGN population. We describe the Monte Carlo method used to unveil the intrinsic properties of the AGN using their multi-band X-ray colours. The measured distribution of AGN in z, L_X and N_H space is compared with the distributions predicted by a number of XLFs and absorption models. In contrast to other studies, we do not find any evidence that the absorption distribution is dependent on redshift or intrinsic luminosity.
@article{arxiv.astro-ph/0511436,
title = {Unveiling the distribution of absorption in the AGN population},
author = {Tom Dwelly and Mathew J. Page},
journal= {arXiv preprint arXiv:astro-ph/0511436},
year = {2007}
}
Comments
2 pages, 2 figures. To appear in the proceedings of "The X-Ray Universe 2005" conference, 2005 Sept 26-30, El Escorial, Madrid, Spain